Coupling for floor machine brushes



l1g- 19 1952 M. DREwEs, JR., ETL 2,607,501

COUPLING FOR FLOOR MACHINEv BRUSHES Filed Dec. l, 1949 .F/Exj.

udgene lambeau Patented Aug. 19, 1952 UNITED,.s/sfrArEs grafia-Nif`v :oFFIcE i "Menke-Drewe's, Jr., andEugene Y( )I'1amb eau, Chica`g'o", 111:; assignors to Breuer Electric Manufac- A- turing Company, Chicago, Ill.;.a"corporatioi1' of .Pi-Illinois v .Appliamanecember 1, 1949, serial No. 130,554

52,' Claims. .Thisinvention relates 'to couplingsfandis vmore particularly concernedwith the provision of a i coupling adapted'forA use in' detachably'connecting brush backs 'tothe' operating shaftlofy a kdisctype lfloor treating machine: During" the opera- `tion of `floor treating machinesfit is often -nec essar'y to replaceworn Abrusheswith newbrushes and .itis,...thereoredesirable to provide a cou- ...pling means vbirgubichdorush backs may be quickv ly engag'ed'or disengaged. The present,.mventiorncontemplates the provision of a coupling' device comprising a plug memv-ber-=sec11red tothev-operating1shaftl'ofithe iioor treating machine to receive-and. engagea-socket member-secured torthexbrushfbaokthe plug mem-Y ber.,xbeing provided with ..a plurality of .radially ,disposed spring pressed plungers adapted to enbei'.

invention further, contemplates the provi- .sion of a coupling devicepomprisingplug and .,.-.socket.members, the socketmemberbeing discon- .nected from the plug member .by merelyrotating the socket member in a reverse direction-to the normal direction of rotation of the operating' shaft.

This invention further contemplates the provision of a coupling device in which the socketv member is automatically locked in position upon its coacting plug member by merely inserting the plug member into the socket member and then operating the motor of the floor treating machine.

This invention further contemplates the provision of a coupling device which is relatively simkple and inexpensive to manufacture and which will not readily get out of order.

This invention embodies other novel features, details of construction and arrangement of parts which are hereinafter set forth in the specication and claims and illustrated in the accompanying drawing, wherein:

Fig. l is a side elevational View, partly in section, showing a coupling device embodying features of the present invention.

Fig. 2 is a bottom plan View showing a coupling device.

Fig. 3 is a detailed sectional view taken along the line 3-3 of Fig. l.

Referring now to the drawing for a better understanding of this invention, the coupling for :floor treating machine brushes is shown as comprising a cylindrical plug member 6 formed with an axial bore I to snugly receive the operating shaft 8 of a iloor treating machine 9. The plug member is also preferably formed with an annuggage'within recesses formed .in the, socket memlariiange. Il .which issecured to .the operating `,.,sha'ft'l 8 by ymeans `of.,.cap ,screws I2;A The outer L 'Tend oftheplug member isvformedlwitnaplurality .of .equallyv` spaced, radially disposed aper- 5..tur 'es I3. adapted ,torelceive plunger housings I4, ,the housings having their. outer `surfaces knurled ...and forcedinto their respective ,apertures H:onder ,pressure. f

. ...,One'end-oreachrhousingIAiis boredatjl to 10. rslidably-.receive,aplunger Il, the other eird'of the housingbeing bored ,at L8 to .receivea .Q Qmpres- ...sion. spring I9,. .-Theinner` end of Y,tl 1e. bore I8 .-'terminates at ,a shoulder ZIadaptedto. normally ehg'agethe head portion zzprovided 'on the inner end' of the .plunger ll,.,and;theouter lend .0f the l borefl 8 is threaded toreceiveascrew 23.

LA .sockeLmember 2.6 telescopically mounted on, the. pluglmember. ,6. and.. provided at itsinner ...end ,with arrannular flange VZ'Ladapte.dito be se- 2.0 curedtothe back 2.8 ofabrush `29 bymans of screws 3 I.. g. Thetouter `end of thesocketmember .is..for'med.with.alplurality ofrecesses .32 to receive the rends .of the.V Dlunger's IJ, and'. thai-nner end .of-,the .socketmember isv formed with an annular inwardlypconverging.shoulder 33ltocngage and force the plun'gersr inwardly when the socket member is being mounted upon the plug member. The socket member is formed with a cam surface 34 adjacent each recess 32 to engage and force a plunger inwardly when the socket member is rotated in a reverse direction to the normal direction of rotation of the operating shaft 8, the cam surface being in circumferential alignment with and extending inwardly from its recess to 35 terminate at the inner surface of the socket member.

In mounting a brush 29 and its socket member 26 upon a plug member 6 secured to the operating shaft 8 of a floor treating machine 9, the brush is positioned upon a floor with the socket member proj cting upwardly therefrom. The floor treating machine is then moved to position the plug member in vertical alignment above the socket member and is then lowered to cause the plug member to move downwardly into the socket member. As the plug member moves into the socket member, the plungers I1 are forced inwardly by the inwardly converging shoulder 33 provided on the socket member. After the plug 5,0 member is fully engaged within the socket member, rotational movement of the operating shaftl and plug member relative to the socket member causes the ends of the plungers to move into registry with and engagement in the recesses 32.`

In removing a brush and its socket member l1 inwardlyjuntil the ends of the plungers engage the inner surface of the socket member, the brush and socket member then being drawn axially from the plug member,

y cause the cam surfaces 34 to vforcerthe plungers .A

V While this invention has been shown inAbut one form, it is obvious tothose skilled in the art. Y

that it is not so limited but is susceptible of various changes and Vmodifications without departing from the spirit and scope of the claimed invention. Y Y, Y Y

We claim as our invention:

1. In a coupling for detachablyconnecting a brush lbackto the operating shaft of a floor treati. ing machine, a cylindrical plugmember, a tubular socket member for snug telescopic engagement With said plug member, said socket member having a radially disposed recess formedk in its rlower edge, and a spring pressed plunger mounted on said plug member for radial movement into and outof said socket member recess for detachably securing said socket member on said plug member, said plunger being normally disposed in its outer position and movable inwardly ref sponsive to relative axial Vand rotational movement of said plug and. socket members vduring en- 2. In a coupling for detachably connecting a brush back to the operating shaft of a floor treating machine, a cylindrical plug member, a tubular socket member for snug telescopic engagement with said plug member, said socket member having a radially disposed recessgformed in its lower edge;` and aV spring pressed plunger `mounted on said plug member for radial movement into and out of saidrsocket member recess for detachably securing said socket member on said plug member, said plunger being normally disposed in its outer position and movable inwardly responsive to relative axial and rotational movement of said plug and socket members during engagement or disengagement of said socket member with said plug member, said socket member having a cam surface disposed to engage and move said plunger out of said socket member recess responsive to relative rotational movement of said plug and socket members infone direction, the inner end of said socket member being formed'with an annular inwardly converging-shoulder `to engage gagement or disengagement of said socketmem- Y j Aber with saidvplug member, said socket member having a cam suriace'disposed adjacent to and diverging inwardlyfrom said Vrecess and terminating at the inner periphery of the socket memy ,ber to engage and move said plunger out of said members in one direction, the inner end of said v Y socket member being formedgwith an annular j inwardly converging shoulder to engage and move said plunger inwardly during mounting of said Y socket member upon said plugmember.

MENKE DREWES, JR'. EUGENE o.l LAMBEAU.

Y REFERENCES cirED'f A The following references are'ofrecord in the Vle of this patent:

UNITED STATES PATENTS Number Name t Date 599,783 Hogan A Mar. l, 1898 661,558 Shul Nov. 13, 1900 789,222 VLovekin May 9, 1905 Y 1,119,392 Bernett Dec. 1, 1914 1,814,655 Andreasson July/'14, 1931 i 1,844,446 Spohr et al. Feb. 9, 1932 VJunge July 2,3, 1935 

